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On-demand semiconductor single-photon source with near-unity indistinguishability
- Source :
- Nature Nanotechnology 8, 213 (2013)
- Publication Year :
- 2013
-
Abstract
- Single photon sources based on semiconductor quantum dots offer distinct advantages for quantum information, including a scalable solid-state platform, ultrabrightness, and interconnectivity with matter qubits. A key prerequisite for their use in optical quantum computing and solid-state networks is a high level of efficiency and indistinguishability. Pulsed resonance fluorescence (RF) has been anticipated as the optimum condition for the deterministic generation of high-quality photons with vanishing effects of dephasing. Here, we generate pulsed RF single photons on demand from a single, microcavity-embedded quantum dot under s-shell excitation with 3-ps laser pulses. The pi-pulse excited RF photons have less than 0.3% background contributions and a vanishing two-photon emission probability. Non-postselective Hong-Ou-Mandel interference between two successively emitted photons is observed with a visibility of 0.97(2), comparable to trapped atoms and ions. Two single photons are further used to implement a high-fidelity quantum controlled-NOT gate.<br />Comment: 11 pages, 11 figures
Details
- Database :
- arXiv
- Journal :
- Nature Nanotechnology 8, 213 (2013)
- Publication Type :
- Report
- Accession number :
- edsarx.1303.4058
- Document Type :
- Working Paper
- Full Text :
- https://doi.org/10.1038/nnano.2012.262